Spencer Klein has served as principal horn of a number of different ensembles in many different musical settings.  Some highlights include Schumann's Fourth Symphony, Berlioz's Symphony Fantastique, Sibelius's Second Symphony, Maslanka's Seventh Symphony, Walton's First Symphony, Mahler's Second Symphony, and Dvorak's New World Symphony. This coming summer Klein has engagements playing Sibelius' First Symphony with the Apollo Orchestra as well as a seven-city tour of South Africa playing Richard Strauss' Ein Heldenleben, Beethoven's Fifth Symphony, and Mahler's Second Symphony. Klein has worked with such conductors as Pablo Rus Broseta, Jonathan McPhee, Tamara Dworetz, James Burton, and Benjamin Zander.